Look carefully at almost any piece of clothing with a zip attached to it and there’s a good chance you’ll see three subtly stamped letters: YKK. After years of wondering why so much of my clothing was YKK compliant, I decided to do some investigating.
YKK is the world’s largest manufacturer of zips. In fact, more than 90% of all the zips in the world are made by this one business. Where would you guess this titan of fastening was based? China? Vietnam? Nope. YKK is Japanese.